CN105511145A - Display device and fabrication method thereof - Google Patents
Display device and fabrication method thereof Download PDFInfo
- Publication number
- CN105511145A CN105511145A CN201610077012.3A CN201610077012A CN105511145A CN 105511145 A CN105511145 A CN 105511145A CN 201610077012 A CN201610077012 A CN 201610077012A CN 105511145 A CN105511145 A CN 105511145A
- Authority
- CN
- China
- Prior art keywords
- layer
- liquid crystal
- light
- substrate
- led
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a display device and a fabrication method thereof. The display device comprises a backlight module, an array substrate, liquid crystal and a color-film substrate, which are formed on a first substrate, and are formed through a sputtering technology. Various parts of the display device all are formed through the sputtering technology, and the display device can be compatible with existing equipment and technology of a TFT-LCD to finish fabrication, so that the utilization rate of a production line is improved and the production cost is reduced. In addition, the backlight module also comprises cholesteric liquid crystal and a 1/4 wave plate, so that the display device has the advantages of relatively high transmittance, relatively low preparation cost and relatively small thickness.
Description
Technical field
The present invention relates to technical field of liquid crystal display, be specifically related to a kind of display device and preparation method thereof.
Background technology
Thin Film Transistor-LCD (ThinFilmTransistorLiquidCrystalDisplay, hereinafter referred to as TFT-LCD) comprises backlight and display panel.Backlight is used for providing light to display panel; Display panel generally comprises the lower polaroid, array base palte, liquid crystal layer, color membrane substrates and the upper polaroid that set gradually.The light that backlight sends, successively through lower polaroid, array base palte, liquid crystal layer, color membrane substrates and upper polaroid, finally realizes display.
Because liquid crystal itself is not luminous, in the various liquid crystal display such as liquid crystal display, LCD TV (LiquidCrystalDisplay, hereinafter referred to as LCD), all need to rely on outside backlight to realize display.Backlight generally can be included in the LED lamp bar that light guide plate side is arranged, in this kind of situation, when producing TFT-LCD, LED lamp bar purchases and combines assembling outside needing, the existing device of compatible TFT-LCD and technique can not complete making, reduce the utilization factor of producing line, improve production cost.
Summary of the invention
For defect of the prior art, the invention provides a kind of display device and preparation method thereof, the existing device and the technique that achieve compatible TFT-LCD complete making, improve the utilization factor of producing line, reduce production cost.
First aspect, the invention provides a kind of display device, comprising:
Form backlight module, array base palte, liquid crystal and color membrane substrates on the first substrate, wherein said backlight module, array base palte, liquid crystal and color membrane substrates are for be formed by sputtering technology.
Optionally, described backlight module comprises the reflecting plate, light guide plate, LED, light shield layer, cholesteric liquid crystal and the quarter-wave plate that are formed on described first substrate;
Wherein, described LED is positioned at the side of described light guide plate, and the projection of described light shield layer on described first substrate covers the projection of described LED on described first substrate, and part covers the projection of described light guide plate on described first substrate;
The pitch sense of rotation of described cholesteric liquid crystal is left-handed, allows right-hand circular polarization Transmission light, and by left circularly polarized light reflection to described reflecting plate; Or the pitch sense of rotation of described cholesteric liquid crystal is dextrorotation, allow Left-hand circular polarization Transmission light, and by right-circularly polarized light reflection to described reflecting plate.
Optionally, described light shield layer comprises light-absorption layer and/or reflector layer.
Optionally, described light shield layer comprises light-absorption layer and reflector layer, and described light-absorption layer superposes with described reflector layer, and described reflector layer is near described LED.
Optionally, described LED comprises the grid be formed on the second substrate, gate insulation layer, active layer source electrode and drain electrode, and be formed in described source electrode or drain electrode on flatness layer, be inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that covered by the via hole on flatness layer and described flatness layer of described anode or drain is connected.
Optionally, described LED comprises: be formed in the grid on the second substrate, gate insulation layer, active layer source electrode and drain electrode, and be formed in described source electrode or drain electrode on flatness layer, be inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that described anode is covered by the via hole on flatness layer and described flatness layer or drain is connected, and described pre-tendency layer, anode, P type doped layer, quantum well, N-type doped layer are connected with described gate insulation layer at the fringe region of described LED with the edge of negative electrode.
Optionally, described light guide plate comprises: be formed in the first substrate on reflecting plate, the first transparency electrode, Polymer Dispersed Liquid Crystal (PolymerDispersedLiquidCrystal is called for short PDLC) film, the second transparency electrode and second substrate.
Second aspect, present invention also offers a kind of method for making of display device, comprising:
Backlight module is formed on the first substrate by sputtering technology;
Described backlight module forms array base palte by sputtering technology;
Described array base palte forms liquid crystal by sputtering technology;
Described liquid crystal forms color membrane substrates by sputtering technology.
Optionally, describedly form backlight module by sputtering technology on the first substrate, comprise further:
Described first substrate forms reflecting plate;
Described reflecting plate forms light guide plate, forms LED at the side of described light guide plate;
Described LED forms light shield layer;
Described light shield layer forms cholesteric liquid crystal;
Described cholesteric liquid crystal forms quarter-wave plate;
Wherein, described LED is positioned at the side of described light guide plate, and the projection of described light shield layer on described first substrate covers the projection of described LED on described first substrate, and part covers the projection of described light guide plate on described first substrate;
The pitch sense of rotation of described cholesteric liquid crystal is left-handed, allows right-hand circular polarization Transmission light, and by left circularly polarized light reflection to described reflecting plate; Or the pitch sense of rotation of described cholesteric liquid crystal is dextrorotation, allow Left-hand circular polarization Transmission light, and by right-circularly polarized light reflection to described reflecting plate.
Optionally, described LED forms light shield layer, comprises further:
Described LED is formed light-absorption layer and/or reflector layer.
Optionally, described LED forms light shield layer, comprises further:
Described LED forms reflector layer, described reflector layer forms light-absorption layer.
Optionally, form LED at the side of described light guide plate, comprise further:
Second substrate is formed grid, gate insulation layer, active layer source electrode and drain electrode successively, described source electrode or drain electrode forms flatness layer successively, is inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that covered by the via hole on flatness layer and described flatness layer of described anode or drain is connected.
Optionally, form LED at the side of described light guide plate, comprise further:
Second substrate is formed grid, gate insulation layer, active layer source electrode and drain electrode successively, described source electrode or drain electrode forms flatness layer successively, is inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that described anode is covered by the via hole on flatness layer and described flatness layer or drain is connected, and described pre-tendency layer, anode, P type doped layer, quantum well, N-type doped layer are connected with described gate insulation layer at the fringe region of described LED with the edge of negative electrode.
Optionally, described reflecting plate forms light guide plate, comprises further:
Described reflecting plate is formed first substrate, the first transparency electrode, pdlc film, the second transparency electrode and second substrate successively.
As shown from the above technical solution, a kind of display device provided by the invention and preparation method thereof, each several part of this display device is all formed by sputtering technology, the existing device of compatible TFT-LCD and technique can complete making, improve the utilization factor of producing line, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of display device of the prior art;
The structural representation of the display device that Fig. 2 provides for one embodiment of the invention;
The structural representation of the LED that Fig. 3 provides for one embodiment of the invention;
The structural representation of the LED that Fig. 4 provides for another embodiment of the present invention;
The structural representation of the light guide plate that Fig. 5 provides for one embodiment of the invention;
The light schematic diagram that the light guide plate that Fig. 6 A and Fig. 6 B provides for one embodiment of the invention drives;
The schematic flow sheet of the display device preparation method that Fig. 7 provides for one embodiment of the invention;
The structural representation of the cholesteric liquid crystal that Fig. 8 provides for one embodiment of the invention;
The curve synoptic diagram of the wavelength that Fig. 9 provides for one embodiment of the invention and liquid crystal molecule transmissivity.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 2 shows the structural representation embodiments providing a kind of display device, as shown in Figure 2, this display device comprises the backlight module 1, array base palte 2, liquid crystal 3 and the color membrane substrates 4 that are formed on the first substrate 5, and wherein above-mentioned backlight module 1, array base palte 2, liquid crystal 3 and color membrane substrates 4 is what formed by sputtering technology.
The each several part of above-mentioned display device is all formed by sputtering technology, the existing device of compatible TFT-LCD and technique can complete making, improve the utilization factor of producing line, reduce production cost.
In liquid crystal display, light source emits beam to light guide plate, and make light guide plate become area source, light guide plate emits beam to display panel, and this light is successively through lower polaroid, the liquid crystal layer between array base palte and color membrane substrates, upper polarizer.Concrete, light can be broken down into the light parallel with the plane of incidence and the light vertical with the plane of incidence, when light is through lower polaroid, the light parallel with the plane of incidence can pass lower polaroid, the light vertical with the plane of incidence is then absorbed by lower polaroid, make the brightness that light losing is a large amount of, cause the effective rate of utilization of light lower, and cause the brightness shown by display panel lower.A kind of mode improving brightness of the prior art, as shown in Figure 1, comprise conventional backlit parts 03, lower polaroid 01, display panel 00, upper polarizer 02 and reflecting type polarizing increment film 04 (DualBrightnessEnhancementFilm is set between the backlight assembly 03 and lower polaroid 01 of routine, be called for short DBEF), solve the effective rate of utilization of light and the low problem of brightness shown by display panel.But the price of DBEF is higher, simultaneously DBEF is that the PEN material laminate of about 800 layers of different refractivity forms, and requires higher to instrument and supplies.
Above-mentioned backlight module 1 in the present embodiment display device comprises the reflecting plate 11, light guide plate 12, LED13, light shield layer 14, cholesteric liquid crystal 15 and the quarter-wave plate 16 that are formed on above-mentioned first substrate 5;
Wherein, above-mentioned LED13 is positioned at the side of above-mentioned light guide plate 12, and the projection of above-mentioned light shield layer 14 on above-mentioned first substrate 5 covers the projection of above-mentioned LED13 on above-mentioned first substrate 5, and part covers the projection of above-mentioned light guide plate 12 on above-mentioned first substrate 5;
The pitch sense of rotation of above-mentioned cholesteric liquid crystal 15 is left-handed, allows right-hand circular polarization Transmission light, and by left circularly polarized light reflection to said reflection plate 11; Or the pitch sense of rotation of above-mentioned cholesteric liquid crystal 15 is dextrorotation, allow Left-hand circular polarization Transmission light, and by right-circularly polarized light reflection to said reflection plate 11.
The backlight module that the present embodiment provides, left circularly polarized light (right-circularly polarized light) in the light that cholesteric liquid crystal 15 can make light guide plate 12 send through, and right-circularly polarized light (left circularly polarized light) reflection in light light guide plate 11 sent is to reflecting plate 11, it is made constantly to reflect between cholesteric liquid crystal 15 and reflecting plate 11, and in the process, right-circularly polarized light (left circularly polarized light) is constantly converted into left circularly polarized light (preferred circularly polarized light), thus the most of light making light guide plate 12 send can through cholesteric liquid crystal 15, improve transmitance and the effective rate of utilization of light.And compared with prior art, in the present embodiment, do not comprise DBEF, its manufacturing cost is reduced, in addition, the backlight module in the present embodiment, directly can provide linearly polarized light, do not need lower polaroid between backlight module and array base palte, reduce the thickness of display device.
Above-mentioned light shield layer 14 comprises light-absorption layer 141 and/or reflector layer 142.When light shield layer comprises light-absorption layer 141 and reflector layer 142, light-absorption layer 141 superposes with above-mentioned reflector layer 142, and above-mentioned reflector layer 142 is near above-mentioned LED.Wherein the material of reflector layer 142 can be Al, the light of LED outgoing can be reflected, improve the utilization factor of LED emergent ray, light-absorption layer 142 is for by unreflected for reflector layer 142 light or when no-reflection layer 142, the light of LED upwards outgoing is absorbed, avoids this light to mix the light of disturbing light guide plate 12 outgoing.
Above-mentioned LED13 can be accomplished in several ways, and is described in the present embodiment with two kinds of implementations, and first kind of way is the structural representation of front luminescence; The second way is the equal luminous structural representation in front and side.
First kind of way, as shown in Figure 3, LED13 comprises the grid 132 be formed on the second substrate 131, gate insulation layer 133, active layer 134, source electrode 135 and drain electrode 136, is formed in the flatness layer 137 in above-mentioned source electrode 135 or drain electrode 136, pre-tendency layer 138, anode 139, P type doped layer 140, quantum well 141, N-type doped layer 142 and negative electrode 143; Wherein, the source electrode 135 that above-mentioned anode 139 is covered by the via hole on flatness layer 137 and above-mentioned flatness layer 137 or drain 136 is connected, and based on this, achieves front luminescence.This figure can be understood as the LED on the left of the light guide plate 12 in Fig. 2, and when also arranging LED on the right side of light guide plate 12, the structure of its LED can be understood as the mirror-image structure of Fig. 3, and the present embodiment is no longer described in detail.
The second way, as shown in Figure 4, LED13 comprises: be formed in the grid 132 on the second substrate 131, gate insulation layer 133, active layer 134, source electrode 135 and drain electrode 136, is formed in the flatness layer 137 in above-mentioned source electrode 135 or drain electrode 136, pre-tendency layer 138, anode 139, P type doped layer 140, quantum well 141, N-type doped layer 142 and negative electrode 143; Wherein, the source electrode 135 that above-mentioned anode 139 is covered by the via hole on flatness layer 137 and above-mentioned flatness layer 137 or drain 136 is connected, and above-mentioned pre-tendency layer 138, anode 139, P type doped layer 140, quantum well 141, N-type doped layer 142 are connected with above-mentioned gate insulation layer 133 at the fringe region of above-mentioned LED with the edge of negative electrode 143.What the fringe region of this LED referred to is away from the region of TFT near light guide plate 12, based on this, achieves front and lateral emitting.This figure can be understood as the LED on the left of the light guide plate 12 in Fig. 2, and when also arranging LED on the right side of light guide plate 12, the structure of its LED can be understood as the mirror-image structure of Fig. 4, and the present embodiment is no longer described in detail.
Above-mentioned light shield layer 14 can be arranged according to the setting position of LED, such as, only when the side of light guide plate 12 arranges LED, light shield layer 14 also can be arranged on LED side, one-sided LED is set time, the surface of contact out-of-flatness of cholesteric liquid crystal 15 and light shield layer 14 can be caused, therefore, when light guide plate 12 one-sided arranges LED, preferably, need to arrange a flatness layer between light shield layer 14 and cholesteric liquid crystal 15.
The present embodiment additionally provides the structural representation of light guide plate 12, and as shown in Figure 5, above-mentioned light guide plate 12 comprises: be formed in first substrate 121, first transparency electrode 122, pdlc film 123, second transparency electrode 124 and the second substrate 125 on reflecting plate.Wherein, if the first transparency electrode 122 and the second transparency electrode 124 do not apply voltage on pdlc film, the liquid crystal display of light guide plate 12 is such as used to be in closed condition, when not forming electric field between the first transparency electrode 122 and the second transparency electrode 124, first transparency electrode 122 and the second transparency electrode 124 do not apply voltage at pdlc film, so when without impressed voltage, the intermembranous of pdlc film 123 can not form regular electric field, the direction of optic axis of liquid crystal is random, present disordered state, the effective refractive index n of pdlc film 123
0not with the refractive index n of polymkeric substance
ecoupling, as shown in Figure 6A, transmission is incident on the light (direction of arrow as in Fig. 6 A) on pdlc film 123, now pdlc film 123 keeps light transmission state, make the light transmission that light guide plate 12 can keep good, and then make to use the liquid crystal apparatus transparencies such as the liquid crystal display of light guide plate 12 to improve.The structure of this light guide plate the existing device of compatible TFT-LCD and technique can complete making equally, improves the utilization factor of producing line, reduces production cost.
In another attainable mode, as shown in Figure 6B, if the first transparency electrode 122 and the second transparency electrode 124 apply voltage on pdlc film 123, the liquid crystal display of light guide plate 12 is such as used to be in opening, when forming electric field between the first transparency electrode 122 and the second transparency electrode 124, first transparency electrode 122 and the second transparency electrode 124 pairs of pdlc films 123 apply voltage, so when being applied with external voltage, the optical axis of the liquid crystal in pdlc film 123 is perpendicular to the surface alignment of pdlc film 123, namely liquid crystal optic axis direction is consistent with direction of an electric field, in pdlc film 123, the optical axis of liquid crystal is perpendicular to the surface alignment of pdlc film 123, namely liquid crystal optic axis direction is consistent with direction of an electric field, the effective refractive index n of pdlc film 123
0with the refractive index n of polymkeric substance
ecoupling, without sharp interface, constitutes uniform medium, and reflect and be incident on light on pdlc film 123 as shown in Figure 6B, it should be noted that, the light be incident on pdlc film 123 can be natural light, also can be the light etc. that light guide plate 12 sends.
General, the first transparency electrode 122 also can become nontransparent reflecting electrode, if when the first transparency electrode 122 is nontransparent reflecting electrode like this, can make the reflecting plate 11 in backlight module.
The transparency electrode being routine for the first transparency electrode 122 in the present embodiment is described, and is described below to the principle of work of above-mentioned light transmission.
When the voltage that the first transparency electrode 122 and the second transparency electrode 124 apply becomes reflection state, the light that light source is launched comprises left circularly polarized light and right-circularly polarized light, after on this light to pdlc film 123, by light to cholesteric liquid crystal (such as, pitch sense of rotation is left-handed) time, because cholesteric liquid crystal is left hand direction, therefore transmission right-circularly polarized light, reflection left circularly polarized light, after again being arrived pdlc film 123 by the left circularly polarized light reflected, right-circularly polarized light is become after left circularly polarized light reflects by reflecting plate 11, go out through cholesteric liquid crystal transmission again through light guide plate again, the light that non-transmission is gone out is at reflecting plate 11, repeatedly carry out between pdlc film 123 and cholesteric liquid crystal reflecting and the switching of left circularly polarized light and right-circularly polarized light, until light is all through cholesteric liquid crystal, quarter-wave plate by cholesteric liquid crystal through right-circularly polarized light be converted into linearly polarized light, at this linearly polarized light directive display panel, in the liquid crystal layer of display panel, the yawing moment of this linearly polarized light produces deflection according to the angle of liquid crystal molecule, thus make display panel can display frame.
Fig. 7 shows the schematic flow sheet of the above-mentioned display device method for making that the embodiment of the present invention provides, and as shown in Figure 7, the method comprises the following steps:
701, backlight module is formed by sputtering technology on the first substrate;
702, on above-mentioned backlight module, array base palte is formed by sputtering technology;
703, on above-mentioned array base palte, liquid crystal is formed by sputtering technology;
704, on above-mentioned liquid crystal, color membrane substrates is formed by sputtering technology.
The method prepares each parts in display device by sputtering technology, the existing device of compatible TFT-LCD and technique can complete making, improve the utilization factor of producing line, reduce production cost.
Below by specific embodiment, said method is described in detail.
S1, on the first substrate utilize sputtering technology sputter reflecting plate, the material of reflecting plate can be the reflecting materials such as aluminium (Al).
S2, in said reflection plate, form light guide plate.
Concrete, said reflection plate is formed first substrate, the first transparency electrode, pdlc film, the second transparency electrode and second substrate successively, and the light guide plate after formation is as shown in Figure 5.
Wherein, the size of the scattering point on first substrate and second substrate and intensive drive by adjustment the sub-pix of pdlc film number adjusted, thus revise fabrication error, site board design error in good time, reach best display effect.
It should be noted that, lower first transparency electrode of this light guide plate also can use nontransparent reflecting electrode, can reduce the making of reflecting plate.
S3, light guide plate side formed LED.
Wherein LED comprises the LED of front luminescence and the LED of the equal luminescence in front and side, and that LED of concrete preparation is prepared according to actual needs, and the present embodiment is described the step of the above-mentioned two kinds of LED of preparation respectively.
The LED of preparation front luminescence, be included on the second substrate and form grid, gate insulation layer, active layer source electrode and drain electrode successively, above-mentioned source electrode or drain electrode form flatness layer successively, is inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance; Wherein, the source electrode that covered by the via hole on flatness layer and above-mentioned flatness layer of above-mentioned anode or drain is connected.
Or the LED of the equal luminescence in preparation front and side, be included on the second substrate and form grid, gate insulation layer, active layer source electrode and drain electrode successively, above-mentioned source electrode or drain electrode form flatness layer successively, is inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance; Wherein, the source electrode that above-mentioned anode is covered by the via hole on flatness layer and above-mentioned flatness layer or drain is connected, and above-mentioned pre-tendency layer, anode, P type doped layer, quantum well, N-type doped layer are connected with above-mentioned gate insulation layer at the fringe region of above-mentioned LED with the edge of negative electrode.
Each layer in above-mentioned preparation LED all can be formed by sputtering technology, namely can complete making by compatible existing TFT-LCD instrument and supplies, improve the utilization factor of producing line.
LED can be formed in side or the both sides of light guide plate, and the present embodiment does not limit it.
The manufacturing process of above-mentioned steps S2 and S3 can be exchanged, the present embodiment does not limit the order of its concrete execution step, above-mentioned LED is positioned at the side of said reflection plate, the projection of above-mentioned light shield layer on above-mentioned first substrate covers the projection of above-mentioned LED on above-mentioned first substrate, and part covers the projection of above-mentioned light guide plate on above-mentioned first substrate.
S4, on LED, form light shield layer.
Can be understood as, above-mentioned LED is formed light-absorption layer and/or reflector layer.Wherein, be included on above-mentioned LED and form reflector layer, above-mentioned reflector layer forms light-absorption layer.Reflector layer usable reflectance material is as Al etc., and light-absorption layer can with light absorbent as BM, and certainly, light shield layer can be chosen one wherein or be superposed by reflecting material and light absorbent and use.
S5, on above-mentioned light shield layer, form cholesteric liquid crystal.
Cholesteric phase is the important phase of one of liquid crystal.In cholesteric liquid crystal, liquid crystal is arrange themselves, and has continuous print helical structure (as shown in Figure 8), can select to reflect the incident light (the Bragg reflection of similar crystal), and it selects reflection characteristic as shown in the formula shown in (1).Wherein, n
0for the ordinary light refractive index of liquid crystal; n
erefractive index for polymkeric substance is the extraordinary ray refractive index of liquid crystal, and P is the pitch of cholesteric liquid crystal.Cholesteric liquid crystal reflects the circularly polarized light identical with its rotation direction and the circularly polarized light contrary with its rotation direction is passed through, and the circularly polarized light passed through becomes linearly polarized light again after the wave plate of λ/4.The pitch sense of rotation of above-mentioned cholesteric liquid crystal is left-handed, allows right-hand circular polarization Transmission light, and by left circularly polarized light reflection to said reflection plate; Or the pitch sense of rotation of above-mentioned cholesteric liquid crystal is dextrorotation, allow Left-hand circular polarization Transmission light, and by right-circularly polarized light reflection to said reflection plate.
λmin＝n
0Pλmax＝n
ePΔλ＝(n
e-n
0)P＝ΔnP(1)
Liquid crystal molecule in described liquid crystal layer is cholesteric phase.
Wherein, described liquid crystal layer also comprises chiral additives, and described chiral additives is mixed between liquid crystal molecule.
The computing formula of the concentration C of described chiral additives in described liquid crystal molecule is as follows:
P＝Δλ/Δn；
C＝1/(P×HTP)；
Wherein, P is the pitch of described liquid crystal molecule, HTP is the intrinsic distortion energy constant of described liquid crystal molecule, λ is the wavelength that the light of reflection selected by described reflecting plate, λ min is the minimum wavelength that the light of reflection selected by described reflecting plate, λ max is the maximum wavelength that the light of reflection selected by described reflecting plate, and Δ n is the birefraction of described liquid crystal molecule.
By the wavelength range delta lambda needing reflection, determine the pitch P of liquid crystal molecule, obtain the concentration C of chiral additives in liquid crystal molecule by the pitch P of liquid crystal molecule.
Thus by carrying out proportioning in liquid crystal molecule by its requirement concentration C, realizing the reflection of specific wavelength, the birefraction due to common liquid crystal is maximum is no more than 0.3, and the reflection wave in visible-range is wide is maximumly no more than 100nm.If the pitch distribution of cholesteric liquid crystal can be widened, make it can reflect the visible ray of 400-740nm, and become linearly polarized light at its exit direction laminating wave plate, the light reflected again utilizes after the reflectors reflects in backlight module again, so just can prepare the effect identical with DBEF, as the curve synoptic diagram that Fig. 9 is wavelength X and liquid crystal molecule transmissivity T, wherein transverse axis represents wavelength X, and the longitudinal axis represents the transmissivity T of liquid crystal molecule.
Liquid crystal molecule in cholesteric phase, for left-handed to liquid crystal molecule or dextrorotation to liquid crystal molecule.For left-handed to liquid crystal molecule, under planar texture state, this liquid crystal molecules parallel arranges planar, but in adjacent plane, the direction of orientation of liquid crystal molecule slightly changes, normal direction along plane does spiral fashion variation, and the distance that direction of orientation experiences 360 ° of changes is called spiral shell square P.The left-handed Bragg reflection carrying out a part to liquid crystal molecule to incident light like this, reflected light is left circularly polarized light, and transmission right-circularly polarized light, thus achieve selective reflecting.
S6, on above-mentioned cholesteric liquid crystal, form quarter-wave plate.
λ=Δ nd, utilizes certain thickness liquid crystal to carry out orientation, and wherein, Δ n is the birefraction of described liquid crystal molecule, and d is the thickness of liquid crystal layer, alignedly can be friction orientation or light orientation, without the need to mask plate, completes making.
S7, carry out the making of normal pixels TFT, be routine techniques, do not repeat them here.
After total visible light reflective cholesteric phase liquid crystal, identical with cholesteric liquid crystal rotation direction structure is reflected, otherwise carries out transmission.The part that wherein a part is reflected back can change rotation direction after reflection, and it can be passed through again through cholesteric liquid crystal, can improve the utilization factor of backlight.
Meanwhile, the present invention by the reflection horizon in backlight, guide-lighting flaggy, done relevant design between LED light source and array base palte and technique integrated,
Existing device and the technique of compatible TFT-LCD complete integrated making, greatly improve the utilization factor of producing line, instead of traditional backlight and make and design, can improve the integrated level of product, effectively reduce cost of products.
In instructions of the present invention, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
The technical term that the disclosure uses or scientific terminology should be in field belonging to the present invention the ordinary meaning that the personage with general technical ability understands." first ", " second " that use in the disclosure and similar word do not represent any order, quantity or importance, and are only used to distinguish different ingredients.Equally, the similar word such as " ", " " or " being somebody's turn to do " does not represent restricted number yet, but represents to there is at least one." to comprise " or the similar word such as " comprising " means to occur that element before this word or object contain the element or object that appear at this word presented hereinafter and equivalent, and do not get rid of other elements or object." connection " or " being connected " etc. similar word be not defined in physics or the connection of machinery, no matter but can comprise electrical connection, be direct or indirectly." on ", D score, "left", "right" etc. only for representing relative position relation, when be described object absolute position change after, then this relative position relation also may correspondingly change.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme, it all should be encompassed in the middle of the scope of claim of the present invention and instructions.
Claims (14)
1. a display device, is characterized in that, comprising:
Form backlight module, array base palte, liquid crystal and color membrane substrates on the first substrate, wherein said backlight module, array base palte, liquid crystal and color membrane substrates are for be formed by sputtering technology.
2. display device according to claim 1, is characterized in that, described backlight module comprises the reflecting plate, light guide plate, LED, light shield layer, cholesteric liquid crystal and the quarter-wave plate that are formed on described first substrate;
Wherein, described LED is positioned at the side of described light guide plate, and the projection of described light shield layer on described first substrate covers the projection of described LED on described first substrate, and part covers the projection of described light guide plate on described first substrate;
The pitch sense of rotation of described cholesteric liquid crystal is left-handed, allows right-hand circular polarization Transmission light, and by left circularly polarized light reflection to described reflecting plate; Or the pitch sense of rotation of described cholesteric liquid crystal is dextrorotation, allow Left-hand circular polarization Transmission light, and by right-circularly polarized light reflection to described reflecting plate.
3. display device according to claim 2, is characterized in that, described light shield layer comprises light-absorption layer and/or reflector layer.
4. display device according to claim 2, is characterized in that, described light shield layer comprises light-absorption layer and reflector layer, and described light-absorption layer superposes with described reflector layer, and described reflector layer is near described LED.
5. display device according to claim 2, it is characterized in that, described LED comprises the grid be formed on the second substrate, gate insulation layer, active layer source electrode and drain electrode, and be formed in described source electrode or drain electrode on flatness layer, be inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that covered by the via hole on flatness layer and described flatness layer of described anode or drain is connected.
6. device according to claim 2, it is characterized in that, described LED comprises: be formed in the grid on the second substrate, gate insulation layer, active layer source electrode and drain electrode, and be formed in described source electrode or drain electrode on flatness layer, be inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that described anode is covered by the via hole on flatness layer and described flatness layer or drain is connected, and described pre-tendency layer, anode, P type doped layer, quantum well, N-type doped layer are connected with described gate insulation layer at the fringe region of described LED with the edge of negative electrode.
7. device according to claim 2, is characterized in that, described light guide plate comprises: be formed in the first substrate on reflecting plate, the first transparency electrode, polymer dispersed liquid crystal film, the second transparency electrode and second substrate.
8. a method for making for display device, is characterized in that, comprising:
Backlight module is formed on the first substrate by sputtering technology;
Described backlight module forms array base palte by sputtering technology;
Described array base palte forms liquid crystal by sputtering technology;
Described liquid crystal forms color membrane substrates by sputtering technology.
9. method according to claim 8, is characterized in that, describedly forms backlight module by sputtering technology on the first substrate, comprises further:
Described first substrate forms reflecting plate;
Described reflecting plate forms light guide plate, forms LED at the side of described light guide plate;
Described LED forms light shield layer;
Described light shield layer forms cholesteric liquid crystal;
Described cholesteric liquid crystal forms quarter-wave plate;
Wherein, described LED is positioned at the side of described light guide plate, and the projection of described light shield layer on described first substrate covers the projection of described LED on described first substrate, and part covers the projection of described light guide plate on described first substrate;
The pitch sense of rotation of described cholesteric liquid crystal is left-handed, allows right-hand circular polarization Transmission light, and by left circularly polarized light reflection to described reflecting plate; Or the pitch sense of rotation of described cholesteric liquid crystal is dextrorotation, allow Left-hand circular polarization Transmission light, and by right-circularly polarized light reflection to described reflecting plate.
10. method according to claim 9, is characterized in that, described LED forms light shield layer, comprises further:
Described LED is formed light-absorption layer and/or reflector layer.
11. methods according to claim 9, is characterized in that, described LED forms light shield layer, comprises further:
Described LED forms reflector layer, described reflector layer forms light-absorption layer.
12. methods according to claim 9, is characterized in that, form LED, comprise further at the side of described light guide plate:
Second substrate is formed grid, gate insulation layer, active layer source electrode and drain electrode successively, described source electrode or drain electrode forms flatness layer successively, is inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that covered by the via hole on flatness layer and described flatness layer of described anode or drain is connected.
13. methods according to claim 9, is characterized in that, form LED, comprise further at the side of described light guide plate:
Second substrate is formed grid, gate insulation layer, active layer source electrode and drain electrode successively, described source electrode or drain electrode forms flatness layer successively, is inclined to layer, anode, P type doped layer, quantum well, N-type doped layer and negative electrode in advance;
Wherein, the source electrode that described anode is covered by the via hole on flatness layer and described flatness layer or drain is connected, and described pre-tendency layer, anode, P type doped layer, quantum well, N-type doped layer are connected with described gate insulation layer at the fringe region of described LED with the edge of negative electrode.
14. methods according to claim 9, is characterized in that, described reflecting plate forms light guide plate, comprises further:
Described reflecting plate is formed first substrate, the first transparency electrode, polymer dispersed liquid crystal film, the second transparency electrode and second substrate successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610077012.3A CN105511145A (en) | 2016-02-03 | 2016-02-03 | Display device and fabrication method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610077012.3A CN105511145A (en) | 2016-02-03 | 2016-02-03 | Display device and fabrication method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105511145A true CN105511145A (en) | 2016-04-20 |
Family
ID=55719236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610077012.3A Pending CN105511145A (en) | 2016-02-03 | 2016-02-03 | Display device and fabrication method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105511145A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354459A (en) * | 2008-09-22 | 2009-01-28 | 北京科技大学 | Method for preparing liquid-crystal film material capable of reflecting circle polarized light and non-polarized light |
| CN101521183A (en) * | 2008-02-27 | 2009-09-02 | 斯坦雷电气株式会社 | Semiconductor light emitting device and method for manufacturing the same |
| US20100208169A1 (en) * | 2009-02-19 | 2010-08-19 | Samsung Electronics Co., Ltd. | Transflective display apparatus |
| CN102628579A (en) * | 2012-02-28 | 2012-08-08 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display device |
| CN103032779A (en) * | 2012-11-08 | 2013-04-10 | 友达光电股份有限公司 | Display device and backlight module thereof |
| CN103969872A (en) * | 2014-04-22 | 2014-08-06 | 京东方科技集团股份有限公司 | Liquid-crystal display device |
| CN104155714A (en) * | 2014-07-10 | 2014-11-19 | 京东方科技集团股份有限公司 | Optical structure and preparation method thereof, backlight module, and display device |
| CN104916527A (en) * | 2015-05-15 | 2015-09-16 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
-
2016
- 2016-02-03 CN CN201610077012.3A patent/CN105511145A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521183A (en) * | 2008-02-27 | 2009-09-02 | 斯坦雷电气株式会社 | Semiconductor light emitting device and method for manufacturing the same |
| CN101354459A (en) * | 2008-09-22 | 2009-01-28 | 北京科技大学 | Method for preparing liquid-crystal film material capable of reflecting circle polarized light and non-polarized light |
| US20100208169A1 (en) * | 2009-02-19 | 2010-08-19 | Samsung Electronics Co., Ltd. | Transflective display apparatus |
| CN102628579A (en) * | 2012-02-28 | 2012-08-08 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display device |
| CN103032779A (en) * | 2012-11-08 | 2013-04-10 | 友达光电股份有限公司 | Display device and backlight module thereof |
| CN103969872A (en) * | 2014-04-22 | 2014-08-06 | 京东方科技集团股份有限公司 | Liquid-crystal display device |
| CN104155714A (en) * | 2014-07-10 | 2014-11-19 | 京东方科技集团股份有限公司 | Optical structure and preparation method thereof, backlight module, and display device |
| CN104916527A (en) * | 2015-05-15 | 2015-09-16 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101474668B1 (en) | Transparent display | |
| US10690983B2 (en) | Reflective display and preparation method thereof | |
| JP6245572B2 (en) | Display panel and display device | |
| WO2014183397A1 (en) | Display apparatus | |
| JP2003215342A (en) | Light reflector, method for producing the same, liquid crystal device and electronic device | |
| TW200302373A (en) | Transflective liquid-crystal display device | |
| KR20100056984A (en) | Optical sheet, illuminating device and liquid crystal display device | |
| JP2010262813A (en) | Lighting device, and liquid crystal display device | |
| JP2011095407A (en) | Display device | |
| CN104155714A (en) | Optical structure and preparation method thereof, backlight module, and display device | |
| CN103941470A (en) | Display panel and display device | |
| KR20130101994A (en) | Display device | |
| CN102890362A (en) | Display device | |
| KR20020077220A (en) | Liquid crystal display | |
| JP2000029010A (en) | Liquid crystal display device | |
| US20060176422A1 (en) | Brightness-enhancing integral polarizer and optical film structure and a manufacturing method thereof | |
| CN101377587A (en) | Liquid crystal display device and optical film | |
| KR101720724B1 (en) | Liquid crystal display and the fabricating method of the same | |
| JP3317158B2 (en) | Reflective liquid crystal display | |
| US7196752B2 (en) | Cholesteric liquid crystal color filter with protrusions and associated methods of manufacture | |
| KR100393390B1 (en) | reflective liquid crystal display device | |
| CN109856880B (en) | Reflector and driving method, display panel and driving method | |
| US20220057676A1 (en) | Display device | |
| KR20010066252A (en) | reflection type and transflection type liquid crystal display device with retardation film | |
| CN105511145A (en) | Display device and fabrication method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160420 |
|
| RJ01 | Rejection of invention patent application after publication |